Can the output of an external filter decrease?
The motors in the pump heads of the JBL CristalProfi external filters are so-called synchronous motors, this means they rotate with a fixed speed that is dependent on the mains frequency, e.g. 3,000 rpm at 50 hertz.
Accordingly, an external filter can’t lose output. If the flow rate decreases, this is either due to soiled filter media or the formation of so-called biofilms, particularly in the hoses.
Please clean the hoses regularly with a hose brush to remove the biofilms. Flushing with warm water is not enough. At the beginning the cleaning interval may be increased.
The filter no long sucks in water.
Please clean all the hoses, pipes and the filter to remove any biofilms, algae and mud in them. It is not enough to simply rinse with tap water. Make sure to use the JBL Cleany hose brush for cleaning. Remove the water from the body of the filter and the hoses. Make sure that the two small stopcock levers on the pump head are in the “OPEN” position. During the following start up procedure, the water outlet pipe with the spray bar, etc. must be positioned ABOVE the surface of the water for optimum ventilation of the appliance. Press the “START” button on the pump head repeatedly with the palm of your hand until water begins to flow into the suction hose (hose on “IN” ). Wait until the filter has filled completely with water and the water in the hose leading to the water outlet pipe (hose on “OUT”) is at the same level as the surface of the water in the aquarium. Connect the filter to the mains power supply. The water will now flow out of the water outlet pipe and into the aquarium. At first, it may be mixed with air that is still trapped between the layers of the filter media. Gently shake the filter to dislodge the air which will escape with the stream of water.
Can I add the carbon dioxide (CO₂) in the suction nozzle of the external filter?
It is not advisable to add the carbon dioxide (CO₂) to the tank water via the suction side of an external filter such as the JBL CristalProfi. This can be solved over the discharge side with an inline diffuser, such as the JBL ProFlora direct.
The following disadvantages arise when adding CO2 via the suction side:
1) There is always a slight vacuum when the filter is running, so that outgassing of the CO₂ may occur.
2) The undissolved gas bubbles collect in the impeller housing, which may lead to running noise.
3) There is also a risk of the water flow stalling in the impeller housing, which may cause a loss of function in the filter.
4) The start button does not function properly when the filter is put into operation.
Can the impellers of the JBL CristalProfi e700, e900 or e1500 filters be used in the JBL CristalProfi e701/2, e901/2 or e1501/2 greenline filters?
The impellers of the JBL CristalProfi e700, e900 or e1500 filters don’t fit into the impeller housings of the JBL CristalProfi e701/2, e901/2 or e1501/2 filters.
Please make sure that you use the appropriate original impellers only. No warranty applies can be granted if other combinations are used.
The start button of the CristalProfi external filter is stuck and does not return to the original position after is is pressed.
This is most likely because the start button was pushed at a slight angle.
Solution: Please unscrew the 4 screws at the corners which secure the lateral handles. After the handles are lifted, you will see 4 more screws which secure the pump head cover. Unscrew these screws. Now you can lift the pump head cover.
This start button is screwed onto a connecting piece. Please turn the button to loosen it. The tension on the spring of the start button usually releases itself after the first rotation.
Replace the pump head cover and the handles in reverse order.
JBL CristalProfi e700
JBL CristalProfi e701
JBL CristalProfi e900
JBL CristalProfi e901
JBL CristalProfi e1500
JBL CristalProfi e1501